摘要
通过热引发剂引发聚己内酯(PCL)自由基交联,再结合紫外光表面二次固化的协同作用,制备了一系列光引发剂添加量不同的PCL形状记忆材料。通过差示扫描量热分析和热重分析、形状记忆性能测试和力学性能测试研究了Irgacure 2959(Ir2959)对PCL交联材料的结晶度和热稳定性、形状记忆性能、力学性能的影响。结果表明,相较于热交联体系,结合紫外光表面二次固化后明显提高了材料的形状记忆性能和力学性能。当光引发剂Ir2959质量分数为3%时(P/B/I-3),材料的形状记忆性能达到峰值,形状固定率(Rf)和形状回复率(Rr)分别由93.0%和91.4%提升至99.5%和99.8%;拉伸强度和断裂伸长率分别由42.5 MPa和658.1%提升至49.9 MPa和805.0%。
A series of polycaprolactone(PCL)shape memory materials with different photoinitiator contents were prepared.The PCL was crosslinked through a thermal initiator to initiate the free radical combining with the synergistic effect of secondary curing on the surface of ultraviolet light.The effects of Irgacure 2959(Ir2959)on the crystallinity,thermal stability,mechanical properties,and shape memory properties of PCL cross-linked materials were investigated.The relationship between the structure and shape memory properties was investigated by differential scanning calorimetry(DSC),thermogravimetry(TG),shape memory performance and mechanical performance testing.The results show that,compared with the thermal cross-linking system,the UV light surface secondary curing enhances the shape memory performance and mechanical properties of the materials significantly.When the photoinitiator Ir2959 is added up to 3%(P/B/I-3),the shape memory performance of the material reaches the highest.The shape fixation rate(Rf)and shape recovery rate(Rr)of P/B/I 3 sample are increased from 93.0%and 91.4%to 99.5%and 99.8%,respectively.The tensile strength and elongation at break of P/B/I-3 sample are increased from 42.5 MPa and 658.1%to 49.9 MPa and 805.0%,respectively.
作者
蒋瑞巧
张佑
马文中
钟璟
Ruiqiao Jiang;You Zhang;Wenzhong Ma;Jing Zhong(Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology,School of Petrochemical Engineering,Changzhou University;Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials,School of Materials Science and Engineering,Changzhou University,Changzhou 213164,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2022年第3期24-31,共8页
Polymer Materials Science & Engineering
基金
江苏省研究生科研与实践创新计划(SJCX21_1232,SJCX21_1183)
中国石油化工股份有限公司科技项目(219018-1)
江苏省先进催化与绿色制造协同创新中心(常州大学)。
关键词
聚己内酯
形状记忆
紫外光
表面固化
polycaprolactone
shape memory
ultraviolet light
surface curing
